Ask an Astronomer
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Added on 30 Jun 2009, 11:48 UTC, last updated on 14 Jun 2010, 23:30 UTC
Latest episodes
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26 Aug 2009, 20:20 UTC
Where Is the Center of the Universe?
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26 Aug 2009, 00:00 UTC
Where Is the Center of the Universe?
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26 Aug 2009, 00:00 UTC
Where Is the Center of the Universe?
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5 Feb 2009, 22:07 UTC
What Is It? (W-5 Star-Forming Region)
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5 Feb 2009, 00:00 UTC
W-5 Star-Forming Region
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5 Feb 2009, 00:00 UTC
W-5 Star-Forming Region
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23 Dec 2008, 00:11 UTC
Why Is the Sky Blue?
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22 Dec 2008, 00:00 UTC
Why Is the Sky Blue?
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22 Dec 2008, 00:00 UTC
Why Is the Sky Blue?
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23 Oct 2008, 20:55 UTC
What's Between the Stars?
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23 Oct 2008, 00:00 UTC
What's Between the Stars?
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23 Oct 2008, 00:00 UTC
What's Between the Stars?
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25 Aug 2008, 17:00 UTC
Special: Spitzer Turns Five
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25 Aug 2008, 00:00 UTC
Spitzer's Fifth Anniversary
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25 Aug 2008, 00:00 UTC
Spitzer's Fifth Anniversary
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1 Jul 2008, 16:20 UTC
What Will Happen to the Earth When the Sun Dies?
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1 Jul 2008, 00:00 UTC
What Will Happen to the Earth When the Sun Dies?
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1 Jul 2008, 00:00 UTC
What Will Happen to the Earth When the Sun Dies?
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8 May 2008, 17:00 UTC
Can a Planet Have Two Suns?
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8 May 2008, 00:00 UTC
Can a Planet Have Two Suns?
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8 May 2008, 00:00 UTC
Can a Planet Have Two Suns?
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10 Apr 2008, 16:40 UTC
Can a Galaxy Die?
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10 Apr 2008, 00:00 UTC
Can a Galaxy Die?
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10 Apr 2008, 00:00 UTC
Can a Galaxy Die?
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13 Mar 2008, 21:25 UTC
Why Aren't There Any Green Stars?
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13 Mar 2008, 00:00 UTC
Why Aren't There Any Green Stars?
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13 Mar 2008, 00:00 UTC
Why Aren't There Any Green Stars?
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13 Feb 2008, 19:04 UTC
How Do You Discover an Asteroid?
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13 Feb 2008, 00:00 UTC
How Do You Discover an Asteroid?
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13 Feb 2008, 00:00 UTC
How Do You Discover an Asteroid?
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18 Dec 2007, 21:30 UTC
Special: Infrared: More Than Your Eyes Can See
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18 Dec 2007, 00:00 UTC
Infrared: More Than Your Eyes Can See
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18 Dec 2007, 00:00 UTC
Infrared: More Than Your Eyes Can See
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5 Nov 2007, 19:45 UTC
Special: M51 and Gizmo in 'Half-Baked Plan'
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5 Nov 2007, 00:00 UTC
M51 and Gizmo
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5 Nov 2007, 00:00 UTC
M51 and Gizmo
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14 Sep 2007, 18:45 UTC
What Happens When Galaxies Collide?
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14 Sep 2007, 00:00 UTC
What Happens When Galaxies Collide?
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14 Sep 2007, 00:00 UTC
What Happens When Galaxies Collide?
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27 Jul 2007, 21:15 UTC
What Is the Nearest Galaxy to the Milky Way?
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27 Jul 2007, 00:00 UTC
What Is the Nearest Galaxy to the Milky Way?
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27 Jul 2007, 00:00 UTC
What Is the Nearest Galaxy to the Milky Way?
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12 Feb 2007, 23:15 UTC
Why Isn't Pluto a Planet Any More?
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12 Feb 2007, 00:00 UTC
Why Isn't Pluto a Planet Any More?
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12 Feb 2007, 00:00 UTC
Why Isn't Pluto a Planet Any More?
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24 Aug 2006, 23:20 UTC
How Can We See a Black Hole?
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24 Aug 2006, 00:00 UTC
How Can We See a Black Hole?
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24 May 2006, 22:30 UTC
What Is a Redshift?
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24 May 2006, 00:00 UTC
What Is a Redshift?
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10 Dec 2005, 01:00 UTC
Do the Stars Really Move?
